Drilling machine



H. a. GEER.

DRILLING MACHINE.

APPLICATION FILED MAR. 10, 1920.

1,407,059, Patented Feb.21,1922.

6 SHEETS-SHEET l.

INVENTOR ATTORNEY H. R. GEER.

I DRI LLING MACHINE.

APPLICATION FILED MAR- 10, I920- 1,407,059, V Patented Feb. 21, 1922.

6 SHEETS-SHEET 2- INVENTOR Harry .6861- ATTORNEY H. R. GEER,

DRILLING MACHINE.

APPLICATION FILED MAR. 10. 1920.

Patented Feb. 21,- 192 6 SHEETS-SHEET 3.

INVENTOR Harry )2 666].

ATTORNE H. R. GEER.

DRILLING MACHINE.

APPLICATION FILED MAR. 10, 1920.

1,407,059, Patented Fb. 21, 1922.

lNVENTOR ATTORNEY H. R. GEER.

DRILLING MACHlNE,

APPL'lCATlON FlLED'h'lAR.10,1920.

1 07,059, Patented Feb. 21, 1922 6 SHEETS-SHEET 5- INVENTOR ATTORNEx H. R. (SEER.

DRILLING MACHlNE.

APPLICATION FILED MAR. 10, 1920.

Patented Feb. .21, 1922.

EARRY. R. GEER, OF JOHNSTQW'N, PENNSYLVANIA o FFHQ;

' nanzniiie sme ma To all 107mm ail/may concern:

Be it known that I, HARRY R. Gama, a citizen of the United States, and a resident of'the city of Johnstown, county of 'GiLHb bria, and State of'Pennsylvanimhavein-,

vented certain new'a nduseful Improvements in Drilling Machines; and I do hereby declare the following to he a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it apperta'ins to make and use the same.

My invention relates to improvements in multiple spindle drilling machines of the'adjustable gang type, in which the spindlesare provided with means for adjustment where by aplurality of holes may be simultaneously drilled. My invention is particularly adapted to drilling holes in the ends of railway rails or the like, but is not intended to be so limited or definedfas it may be used in other connections where it is desired to simultaneously drill a plurality of holes.

One of the objects of my invention is to provide a strong and rigid pillar construction which comprises the use of a right-hand threaded pillar and a left-hand threaded pillar,'the lower portion of each of which is preferably square andis rigidly mounted in the bed frame or base of the drilling machine. The intermediate portions oftlie pillars. are preferablycylindrical and together with the upper threaded portions guide'and support a frame on which is mounted the working parts, of the controlling and drilling mechanism of the machine.

Another object of'myinvention is to pro vide both automatic and manual means for the upward and downward travel of the frame on which the's'pindles and operating parts are mounted, and means for controlling the same whereby the drills may be raised, lowered or stopped at any point as desired, thus insuring desired ease,.accuracy and speed of operation." v Other objects of my invention willappear hereinafter. i I

Having thus given a general description of my invention, 1' will now, in order to make the matter more clear, refer to the annexed SlX ShGEC-S ofdrawings which form part of this specification and in which likecharacters refer to like parts i.-

Figure 1 is a front elevation of myim-v proved drilling machine; Figure 2 is an end elevation ofv the sametFigure is a vertical sectional elevation taken on the line Specification of Lettrsiatent.

2 Application filed March 10, 1920. Serial No.

Patented Feb. 21, 1922;

IHfHI of FigureQ; Figure l is a vertical sectional elevation taken on the line- Ive-IV Figure g res isa horizontal secon the line V- Vzof' tional elevation taken F1gure2; igure 61s a perspective view, to a larger scale, of a type of ball bearingI prefertonse, a p'ortlon of the casing being broken" away to more clearly illustrate the constructiom; F igure is atransverse sec-' tional elevation j of a type of roller thrust bear ng prefer to use Figure Sis a side elevation of the worm-gear which engages the worm on the central spindle shaft; Figure 9 is a verticalsectional elevationof the clutch-gearand worm-gear Figure '10 is a side elevation ofth'e clutch-gearilfigure 11 is a horizontal sectional elevatiomto a larger scale, of the controlling mechanism showing the control-shaft broken away, this section being taken on the center line ofvthe control-shaft; Figure 12 isa longitudinal sectional elevation showing in'deta il the arrangement of the cam mechanism on the i hubs of the hand. control. wl1eel;, Figure 13 is an end elevation of the end of thecontrolshaft and the cam surfaces on the outer end. of the hubsiofthe hand wheel; Figure; 14: is a top plan viewfof a cruciform connector for the universal joints; Figure 15 is a longitudinal.sectional elevationof one of the coupling spindles taken on the line XV-XV of Figure 19; Figure 16 is a transverse sectionah elevation of the V movable frameand the spindle roller bearings taken on the line XVI-XVI of Figure 1; Figure, 17 is aside elevationof the cruciform connector forthe universal joints; Figure 18 is a transverse section of one" of the spindles and its journal bearing showing the rollers between the same; and] Figure 19 is transverse sec tional elevation of one of the coupling spindles. taken on the line XlX-Xl-X of Figure 15. I Referring now to the characters of reference on the drawings :-1 represents the'front bed-frame to which is' secured the back bed- Channels for-med frame the bolts in the front and back bed-frames, land 2 respect-ively. and between the bolts receive the preferably square lower portions 4 of a pair of pillars which 'extend upwardly .and have -'intermediate preferably cylindrical portions'ti. One of the pillarshas' an upper right-hand threaded portion 6 and the other an upper left-hand threaded portion-7. Top and bottom sleeves, 9 and 8 respectively, are slidably mounted on each of the pillars while between these sleeves a sleeve nut engages the threaded upper portion of the pillar. The sleeves 8 and 9 and the sleeve nuts 10 serve to guide and carry a frame upon which is mounted the controlling and drilling mechanism. Upper and lower ball bearings, Band 14 respectively, placed between the sleeves 8 and 9 and the sleeve nuts 10 serve to minimize friction when the bevel gear 12, fastened to the flange 11 of the sleeve nut 10, is rotated thereby raising or lowering the frame 15. v

The frame 15, which is bolted tot-he top and bottom sleeves, 9 and 3 respectively, has a lower flange 16 with openings through which the pillars pass and in which the lower ends of the bottom sleeves 8 set. The frame 15 also has an upper flange 17 with openings which receive the upper ends of the upper sleeves 9. The top flange 17 and the bottom flange 16 are further secured to the sleeves 8 and 9 by bolts through the lugs 20. The top flange 17 supports the motor 18 and is reinforced by the brace 19.

A pinion 22 secured to the shaft 21 of the motor 18 meshes with the drive gear 23 on the main drive shaft 25 and the gearing is suitably enclosed for safety by theguard or casing 24. The main drive shaft 25 which is journaled in the roller bearing 27, t has keyed to it the bevel gears 28, 29 and 30 which mesh with the bevelgears 31. 32 and respectively. The gears 31 and 33 are keyed to the spindle drive shafts 36, provision being made for longitudinal adjustment to take up wear, etc., in the roller thrust bearings 34 and 35, which are housed in the yoke 26 as shown and between the shoulders on the bevel gears 31 and and the shoulder formed by the preferably enlarged head 37 on the spindle drive shafts I 36. The enlarged head 37 of the spindle drive shaft 36 contains a groove which receives one segment of the cruciform connecfor 38, which has another segment that is integral with the first and preferably perpendicular thereto. This latter segment fits into a groove in the preferably enlarged head 39 of the male part of the coupling spindle which has a partially threaded shank 40 entering the female part 42 of the coupling spindle, the projection. therein being adjustable by the nuts 41, thus pro- .viding means for varying the length of thecoupling spindle. The male and female parts 46 and 42 respectively, of the coupling spindle are prevented from rotating upon each other by the feather 43 which is held in place by the sleeve 44 that 18 shrunk on the female part 42 of thecoupling spindle.

The female part 42 of the coupling spindle has preferably enlarged head 45 whlch contains a groove adapted to receive one segment of a connector 46 similar to the cruciform connector 38 heretofore described. The other segment of the connector 46 fits into a groove in the enlarged head 47 of the spindles 48. Each of the spindles 48 has a sleeve 49 shrunk thereon with rollers 50 at each end thereof and is journaled in the bearings 53. vFastened to the frame 15 is a guide 51 having a guide-way 52 that is provided with adjusting slots 54 through each of which passes a bolt 55 that secures the spindle bearing 53 and its accompany ing spindle 48in position according to the drill spacing desired. Each of the spindles 48 is provided at its lower end with a drill socket and a collar 56 whichholds the lower set of the rollers 50 in place and also retains lubricant and excludes .drillings, dust, etc., from the bearing.

The central spindle 57 is driven by the bevel gear 32 at its upper end which is journaled in roller thrust bearings similar to 34 and 35, between the shoulder of the gear 32 and the flanged collar 58, provision being made for longitudinal adjustment to take up wear, etc. The lower end of the central spindle 57 is journaled in the hearing 60 which is an integral part of the guide 51. The rollers 63 in the bearing 66 are retained by the top and bottom collars 62 and 61 respectively, which are secured to the lower part of the central spindle 57 A connecting shaft 65 journaled in bearings 66 which are secured to the back of the frame 15 is provided with ball bearings 72. and has at its ends overhung bevel gears 67 which mesh with the bevel gears 12 secured to the sleeve nuts 10. The shaft 65 has mounted thereon a clutch-gear 68 and a worm gear 70 which meshes with a worm 59 on the central spindle 57. The clutchgear 68 .is prevented from rotating upon the shaft 65 by a feather, but it may slide longitudinally thereon. The worm-gear 70 is carried on'the shaft 65 by. the ball bearings 72 in its hub and it may rotate on or with the shaft 65, depending upon the position of the clutch-gear 68. The worm gear 7 0 is provided with a plurality of radially disposed holes 71 which are adapted to receive a lesser number of radially disposed pins 69 projecting from one side of the clutch gear 68, thereby forming aclutch to control the raising or loweringof the frame 15.

The engagement or disengagement of the clutch formed by the clutch-gear 68 and the worm-gear 70 is dependent upon manual operation by means of the'control-shaft 73, the hand wheel 74 and the parts incidental thereto. One end of the control-shaft 73 is journaled in the inner bearing 88 which is fastened to the front face of the movable frame 15 and the other end passes through the hubs of the hand wheel 74. The inner bearing 88 is provided with a ball bearing clampedtoeach'of its sides as shown in Figure 11. These annular disks 87 project;

over the ends of some of the teeth on the clutch-gear 68. and thus engage it so that,

when the control-shaft v7 3 is moved longitudinally, the clutch ge ar 68 partakes of. an equivalent longitudinalmotion on the'shaft 65, thus bringing into play the clutch action between the clutch-gear 68 and the.- worm gear r In order that the control-shaft 73 may be, moved longitudinally the outer end of the hub of the hand wheelY l is provided with cam surfaces 81 upon whichrides a pin-- passing transversely through the, end of thecontrol-shaft'73. The inner end 77 .of the hand wheel hub is journaled in the. outerbearing 7 5 which is provided with a roller bearing 78 held on the hub by the nut 79, and the hand wheel 74 is held in, the bearing 7 5 b the nut 76. ,Securedon the threaded portlon 80. of the hand wheel hub is a hub cap 182 which houses a spring 83 that sets in the recessed end 8%: of the control-shaft- 73, thereby holding the pin 85 against the; cam surfaces 81 at all times. V v r The back bed-frame 2 has twofupwardly projecting standards 94 betweenwhich is fulcrumed a lever 95 on theipin 96. Thefront end of the lever, 95ha-s hinged thereto by the pin-bolt 98 two rollers 97 which roll' on the wearing plate 99 that-is fastened to the bottom flange 16 of the frame 15. The

. rear end of the lever 95 carries an adjustable.- counterwe ght 100,-wh1ch is thus adapted to relieve the loading on the pillars so as to reduce the friction betweenthe-threads 6. and 7 and the'sleeve nuts 10 when the frame 7 v I I thereby retracting theshaft 73 and disena 15.is raised or lowered I The work to-be drilled is placed on the table of the front bed plate and secured thereto by the clamping arrangement inclicated by 64. i 1

Assuming that the frame 15 is substantially in its lowest positionas shown onthe drawings, the operation of my machine-is as follows :-The frame 15' on which is mounted the drilling mechanism may be raisedv to clear the work by turning the hand wheel 74: clockwise, facing the, wheel. Clockwise" rotation, as stated, of the hand-wheel 74 will cause the pin 85' to, ride upon the cam surfaces 81 .onthe hand-wheel hub, thus retractin the. control-shaft 73 and disen a V c: r r: n

10, thus raising the frame 15'.

.ciently to clear the 'workto be drilled, the

the hand wheel 74; will rotate the shaft 6'5 and the bevel. gears 67'thereon whichmesh with the bevel gears .12 onthe sleeve inuts The,v weight of the counterweight 100 exerted, at all times on, the wearingplate- 99 fastened to the lower side of the flange-16 of the frame 15 helps tobalance the weight of the drilling and operatingmechan'ism so'as to reduce the friction. between the threaded portions 6 and 7 of the pillars and the sleeve nuts 10 thereon, L

'After the frame 15 has been raised 'sufiihand-wheelv 743 is released, whereupon the spring83 will return the shaft 7 3 to the posit-ion'shown by the full: lines in Figure 11, thus engaging the clutch formed bythe. clutch-gear 68 and the worm-gear70. The adjustable spindles 48. are set to the required spacing by moving their bearings 53 in'the; guide 52and adjusting the length of the coupling spindles by the nuts 41. Thenecessary drills are then set in the spindles. and a the drillpress is prepared to drill the work which is securely clamped on the receiving table .of the front betl frame 1 by the clamp:

ing device 64. 7 g

Thej motor 18; rotates the spindles bythe spur gears 22 and 23 and through the drive;

shaft 25 which'is'geared to the spindles by" the bevel gears 28, 29 and 30 which mesh with thebevel gears 31,32 and 33 respectively. The central spindle 57 is a through shaft provided witha-worm 59, thereonjthat engages theworm-gear 70 which is locked to the clutch gear 68"as stated above. The motor 18 now/rotating thespindle 57, will cause the shaft 65 to rotate thereby lowering the frame 15' and automatically feeding thev drills to the ,worle' After. the holes are drilled the frame 15 with the drilling'mech- --anismx thereon may be raised -to clear the work as heretofore described.

The drills may-be stopped at any timeduring the operation by turning the handewheel' 74, a part .of, a turn in either direction, I

gaging, the clutch formed by the clutch-gear 68 and the worm-gear 7 O. The worm-gear 70then runs idle on the shaft 65 and" the motionofthe frame15 ceases. lt is evident that the drill feed may be automatic or manual or a combination of both, depending 1 upon the permissible cutting speed, thus insuring flexibility of operation. e

- It is therefore evident that my improved drilling-machine is capable of handling awide range of work ina thoroughly satisfactory manner, because .of the great fleXi-' bility provided by the'automatic as well as the man'ual control. Furthermore the ease with whiclradjustments may be made insures not only rapid and ellicient operation, but provides also a maximum of safety for the operator, and insures a minimum of spoiled Work.

Although I have described and illustrated my invention in considerable detail, I do not wish to be limited to the exact and specific details thereof as shown and described, but may use such modifications in, substitutions for, or equivalents thereof, as are embraced within the scope of my invention, or as pointed out in the claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. In a drilling-machine, a stationary base, upwardly projecting pillars mounted therein and provided with threaded portions, a

sleeve nut on each pillar engaging the threaded portion thereof, sleeves surrounding the pillars at each end of said sleevenuts, a movable frame attached to said sleeves, drilling mechanism mountedon said frame and means forraising and lowering the same.

2. In a drilling-machine, a stationary base, pillars secured thereto and provided with threaded projections extending therefrom, a nut on the threaded portion of each pillar, sleeves surrounding the projecting portions of each pillar and attached to the nuts, movable frame secured to the sleeves, drilling mechanism mounted on the movable frame, and means whereby the nuts may be simultaneously rotated to advance or retract the drilling mechanism.

3. In a drilling-machine, a base, pillars secured thereto and provided with threaded portions projecting therefrom, a nut on the threaded portion of each pillar, sleeves sur-' rounding the pillars at each end of each. nut, saidi sleeves attached to and supported by the nuts, a movable frame provided with top and bottom flanges secured to said. sleeves, drilling and operating mechanism on said movable frame and means for rotating the nuts simultaneously whereby the motion of the movable frame is controlled.

4t. In a drilling-machine, a base, pillars secured thereto and provided with threaded operating mechanism, means for rotating the nuts simultaneously to advance or retract the drilling mechanism, and means for controlling the feed of the drilling mechanism.

5. In a drilling-machine, a base, pillars secured thereto and provided with threaded portions projecting therefrom, nut on the threaded portion of each pillar, a bevel gear secured to each of the nuts, a shaft provided with bevel gears mounted thereon and adapted to mesh with the bevel gears on said nuts, means for rotating the shaft, sleeves surrounding the pillars at each end of each nut, said sleeves attached to and supported by the nuts, a movable frame provided with top and bottom flanges secured to said sleeves and adapted to carry the drilling and operating mechanism, means for rotating the nuts simultaneously in either direction for advancing or retracting the drilling and operating mechani'snn'and means for con- I trolling the feed of the drilling mechanism.

6. In a drilling-machine, a base, pillars secured thereto and provided with threaded portions projecting therefrom, a sleeve nut on the threaded portion of each pillar, sleeves surroundingthe pillars at each end of each nut, said sleeves attached to and supported by the nuts, a frame secured to said sleeves, spindles mounted on the frame, means for rotating the spindles, and means for simultaneously rotating the nuts on the pillars for advancing and retracting the spindles.

7. In a drillingmachine, a base, pillars secured thereto and provided with threaded portions projecting therefrom, a nut on the threaded portion of each pillar-,a sleeve at each end of each nut on the projecting portion of the pillars which is retained in'position by the nuts, a frame secured to the sleeves, spindles mounted on the frame, means mounted on the frame for rotating the spindles, means for simultaneously rotating the nuts on the pillars for advancing or retracting the drill spindles and means for controlling the rotation of the nuts on the threaded portions of the pillars for advancing or retracting the drilling mechamsm. j

8. In a drilling machine, a base, pillars secured thereto and provided with threaded portions projecting therefrom, a nut on the threaded portion of each pillar, a sleeve surrounding the pillars on each end of each nut which is retained in position by the nuts, a. frame secured to the sleeves, spindles j ournaled in bearings mounted on the frame, means mounted on the frame for continuously rotating the spindles, means for rotating the nuts from the rotating spindles, and means for controlling the rotation of the nuts on the threaded ends of the pillars for advancing or retracting the drilling mechanism.

9. In a drilling machine, a base, threaded pillars secured thereto, a nut on the threaded portion of each pillar adapted to rotate thereon, a connection between the nuts for simultaneously rotating the same, a sleeve on either side of each nut on the pillars abutting against the end of each nut, a frame with top and bottom flanges secured to the sleeves at the sides and ends thereof, spindles journaled in bearings mounted on the frame, means for continuously rotating the spindles mounted on the frame, means for rotating the nuts on the pillars from one of the rotating spindles for advancing the frame and the drilling mechanism mounted thereon, and means for controlling the rotation of the nuts and for retracting the frame and the drilling mechanism mounted thereon independent .of the means for rotating the spindles. I I

10. In a drilling-machine, a base, threaded pillars secured thereto and projecting therefrom, means thereon for supporting a movable frame, spindles journaled in hearings on said frame, means for rotating said spindles, an automatic means and a manual means independent thereof for controlling the longitudinalmotion of said spindles.

11. In a drilling-machine, a base, pillars secured therein and provided with threaded portions projecting therefrom, a sleeve nut on the threaded portion of each pillar, a sleeve surrounding the pillars at each end of each sleeve nut and attached thereto, a

bevel gear secured to each sleeve nut, a

flanged frame attached to the sleeves, a cross shaft mounted onsaid frameand secured to said sleeve nuts, spindles mounted on said frame, a Worm onthe shaft of one of said i spindles, a Worm gear on said cross shaft that may engage said Worm, means for rotating the spindles, a slidable control shaft 3 mounted onsaid frame and provided with a hand Wheel and clutch arrangement for engaging or disengaging the Worm-gear and Worm, thereby providing either automatic or manual control for the longitudinal movement of the spindles.

12. In a drilling-machinepa base, pillars secured thereto, a movable frame supported by said-pillars, automatic means fol-raising or lowering. said frame on the pillars,

spindles rotatably mounted on. said frame,

means for rotating said spindles, a Worm on the shaft of one of the spindles, a slidable cross shaft mounted on the movable frame and'provided with a hand'wheel and clutch for disengaging the automatic lowering and HARRY R. GEER- 

